Anvil 1/2 In. x 1/2 In. FPT Malleable Iron Galvanized Union Knobs & Pulls AC-powered smoke alarms must be

AC-powered smoke alarms must be installed in accordance with all local electrical codes

it's been designed and tested with strength and durability in mind

clutch style

upgraded build delivers 5x life & 2x speed over standard masonry bits

Anvil 1/2 In. x 1/2 In. FPT Malleable Iron Galvanized Union Knobs & Pulls AC-powered smoke alarms must beMalleable galvanized iron pipe fittings. Fed. Spec. WW P 471 B, ANSI B 16. 14 (Dimensions), ANSI B 2. 1 (Pipe Threads), Ferrous Plugs, Bushings, and Locknuts, Fed. Spec. WW P 471 B, ANSI B 16. 14 (Dimensions), ANSI B 2. 1 (Pipe Threads), Malleable Iron Unions (Class 150), Fed. Spec. WW U 531C, ANSI B 16. 39.